20734706187 has 24 divisors (see below), whose sum is σ = 33448584624. Its totient is φ = 12759817248.

The previous prime is 20734706119. The next prime is 20734706219. The reversal of 20734706187 is 78160743702.

20734706187 is a `hidden beast` number, since 20 + 7 + 3 + 4 + 7 + 0 + 618 + 7 = 666.

It is not a de Polignac number, because 20734706187 - 2⁷ = 20734706059 is a prime.

It is a super-2 number, since 2×20734706187² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20734706687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3278688 + ... + 3285005.

It is an arithmetic number, because the mean of its divisors is an integer number (1393691026).

Almost surely, 2^20734706187 is an apocalyptic number.

20734706187 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20734706187 is a deficient number, since it is larger than the sum of its proper divisors (12713878437).

20734706187 is an equidigital number, since it uses as much as digits as its factorization.

20734706187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563721 (or 6563709 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 20734706187 in words is "twenty billion, seven hundred thirty-four million, seven hundred six thousand, one hundred eighty-seven".